Thank you for the reply.
Sorry but you have not understood my problem.
If I use an external UDP or TCP test program (e.g. Axence net tools pro) to send the string Hello to the Wizfi what is sent from the Wizfi UART into the attached microcontroller’s USART is the string \x01SHello\x01E and not \x1bSHello\x1bE as expected. Test using both UDP and TCP.
I found a firmware update on your web site and used the upload instructions and tool to put the firmware into the Wizfi. And without making any other changes to the software in the microcontroller or the test set up the received string changed to \x1bSHello\x1bE. In buying the Wizfi I appear to have bought one with some strange firmware.
I have gone on to test data transmission by the wizfi back to the UDP or TCP test program and the data received by the test program now works correctly as well. I have tested bulk data mode which is now working as expected.
I want to confirm the only change I have made is to upload new firmware into the Wizfi.
It is now working as expected.